#include <iostream>
#include <vector>
using namespace std;

int main() {
	vector<int> v(100);
	for (int i = 0; i < v.size(); ++i)
		cout << v[i];
	vector<int>::iterator i;
	for (i = v.begin(); i != v.end(); ++i)
		cout << *i;
	for (i = v.begin(); i < v.end(); ++i)
		cout << *i;
	i = v.begin();
	while (i < v.end()) {
		cout << *i;
		i += 2;
	}
}